The number of books borrowed weekly from a library follows a normal distribution with a mean of 190 and a standard deviation of 30. Which conclusion does this information best support?

A) There is a 16% chance that more than 250 books are borrowed in a week.

B) There is a 2.1% chance that more than 250 books are borrowed in a week.

C) There is a 68% chance that fewer than 250 books are borrowed in a week.

D) There is an 84% chance that more than 250 books are borrowed in a week.

E) There is an 84% chance that fewer than 250 books are borrowed in a week.

Question

The number of books borrowed weekly from a library follows a normal distribution with a mean of 190 and a standard deviation of 30. Which conclusion does this information best support?

A) There is a 16% chance that more than 250 books are borrowed in a week. 



B) There is a 2.1% chance that more than 250 books are borrowed in a week.



C) There is a 68% chance that fewer than 250 books are borrowed in a week.



D) There is an 84% chance that more than 250 books are borrowed in a week.



E) There is an 84% chance that fewer than 250 books are borrowed in a week.

aaronandyson · Answer

Basically it is saying the average number of books borrowed 190. But it can be 30 more or 30 less at times. So the average is 190 and the other two extremes are 160 and 210.

The answer is E